Power-On Self-Test (Post) - HP ProLiant DL160 Generation 5 Maintenance And Service Manual

Power-On Self-Test (POST)

Before you can use a server, all devices must be tested and initialized, and the operating system must
be bootstrapped to the memory. This is referred to as Power–On Self-Test or POST. POST is a series of
diagnostic tests that checks firmware and hardware components on the system to ensure that the
server is properly functioning. This diagnostic function automatically runs each time the server is
powered on.
These diagnostics, which reside in the BIOS ROM, isolate server-related logic failures and indicate the
board or component that you need to replace, as indicated by the error messages. Most server
hardware failures will be accurately isolated during POST. The number of tests displayed depends on
the configuration of the server.
During POST you can:
•
Press ESC to skip the HP logo and go to POST boot progress display system summary screen
•
Press F8 to display the Boot menu
•
Press F10 to access the Setup Utility
•
Press F12 to request a network boot (PXE)
POST error indicators
When POST detects a system failure, it displays a POST error message.
POST errors message definition
Whenever a non-fatal error occurs during POST, an error message describing the problem appears
onscreen. These error messages are displayed in normal video (white text on black background), and
show the details of the error. The following is an example of a POST error message:
012 --- CMOS Date/Time not set
Table 12 lists the most common POST error messages with corresponding troubleshooting
recommendation. HP recommends that you correct the error, even if the server appears to boot
successfully.
Table 12
POST Error Messages
Error-Code
000
003
004
Error Message
Timer Error
CMOS Battery Low
CMOS setting Wrong
Description / Corrective Action
Indicates an error while programming the count register of
channel 2 of the 8254 timer. This may indicate a problem
with system hardware. Requires repair of the system board.
CMOS Battery is low. This message usually indicates that the
CMOS battery needs to be replaced. It could also appear
when the users intentionally discharge the CMOS battery.
CMOS settings are invalid. This error can be resolved by
using F9 to load optimal default in the Setup Utility.
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